<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body></body>
</html>

<script>
  function sum() {
    var sum = 0;
    for (i = 0; i < arguments.length; i++) {
      sum += arguments[i];
    }
    return sum;
  }

  console.log(sum(1, 2, 3, 4, 5));
</script>
